2024 GMC Sierra 1500 electrical problems

Filed Nov 1, 2026 · Electrical · KS

My 2024 GMC Sierra 1500 SLT has recurring failures of its factory 13.4-inch Google built-in infotainment system, creating significant driver-distraction hazards. Google Maps frequently freezes, crashes, or refuses to calculate routes, even to familiar destinations. Navigation malfunctions occur on approximately 90-95% of days I use it, although individual attempts sometimes work. Certain addresses consistently fail while others work. The system also experiences severe lag, intermittent audio interruptions, and voice assistant failures. The assistant often correctly transcribes spoken commands but fails to execute them. When navigation fails, I must resort to my phone to search for destinations, enter addresses, or manually select locations. Repeated attempts to operate the malfunctioning navigation and voice controls have diverted my attention from the roadway. On multiple occasions, this distraction has contributed to unintended lane deviations while driving on highways. These failures create a serious distraction risk, particularly when navigation is needed in unfamiliar areas. The dealership recommended Apple CarPlay as an alternative, but CarPlay causes additional connectivity and infotainment problems, so I have disabled it. The vehicle has undergone three dealership visits for these concerns. First, technicians reprogrammed the infotainment software using USB. Second, they diagnosed radio faults and replaced the infotainment module under warranty. The replacement performed worse, including repeated navigation failures during a trip near Ames, Iowa. On [XXX], at approximately 19,767 miles, Cable Dahmer of Topeka referenced GM bulletin PIC6602Y and advised that GM Engineering is investigating the issue. No further repair was performed, and no resolution timeline was provided The defects remain unresolved despite multiple repair attempts. I request the federal safety agency investigate whether these widespread infotainment failures constitute a vehicle safety defect INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATI

Filed Oct 26, 2026 · Electrical, Fuel system · KY

My truck has experienced recurring diagnostic trouble code P244B on [XXX], [XXX], and [XXX], 2026. The latest occurrence included a check-engine warning and reduced engine power. On [XXX], at 40,833 miles, Neil Huffman Chevrolet GMC in Frankfort, Kentucky, diagnosed a damaged diesel particulate filter differential-pressure sensor connector. The dealership's written estimate states that the connector had shorted, begun melting, and had broken wires at the back of the connector. I am concerned about the cause of the electrical overheating, the possibility of additional wiring damage, and the risk of unexpected reduced engine power while driving. I have also experienced intermittent transmission-related warnings and communication fault codes, although I do not know whether these problems are related. I understand there are GM technical bulletins addressing wiring-harness damage on certain 3.0L Duramax vehicles. I am not claiming these bulletins establish the cause of my failure, but I would appreciate having my experience evaluated for a possible safety-related defect trend. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 30, 2026 · Electrical, Transmission · MN

At approximately 2 years, 47,000 miles I received a message that I needed to service the transmission soon. I then got a message "Trailer Brakes Disabled Service Required" and another "Service Transmission Now Unable to Shift Soon". I brought the vehicle into my closest GM dealer and they said it is a faulty shift control lever. These are known to have a fault from the factory, but since I am outside of the 36,000 bumper to bumper, they will not cover the cost. It took about 2 months for the part to come in as it was on back order, and now they want $1000 to replace it.

Filed Sep 9, 2026 · Electrical, Engine · NJ

While driving on a divided two lane state highway at approximately 60mph my vehicle suffered a catastrophic engine failure causing immediate loss of power in traffic at highway speeds. I had to negotiate highway traffic to steer the vehicle onto a narrow shoulder and continue under reduced power to a location where the vehicle could remain stopped safely. There were no warning signs and no warning lights prior to the issue. The vehicle was towed to Faulkner GMC where it was eventually inspected and determined to be an engine failure consistent with the open recall affecting GM 6.2 L87 V8 engines. A replacement engine was installed under warranty. Additionally, a defective tailgate switch was discovered and replaced. A prior unrelated incident had occurred where the tailgate switch activated on its own lowering my tailgate while the vehicle was in motion. The tailgate lowered onto the tongue jack of a trailer I was towing causing damage to the tailgate. This issue occurred multiple times throughout my ownership of the vehicle until the switch was replaced. GM acknowledged the switch was found to be defective but refused to take responsibility for the damage.

Filed Sep 7, 2026 · Electrical, Engine · NC

My vehicle has experienced repeated and unresolved electrical system failures and unexpected loss of power steering assist. The problem involves multiple warning lights, module communication faults, drivability issues, and simultaneous malfunctions affecting systems including power steering, traction control, transmission, four-wheel drive, and other electronic controls. Repair records, diagnostic information, and videos documenting the failures are available for inspection upon request. The most serious incident occurred on August 23, 2026, when the power steering failed unexpectedly while I was driving. The sudden loss of steering assist made the vehicle difficult to control and nearly resulted in a collision with an oncoming vehicle. The failure created a significant safety risk because it impaired my ability to safely steer and control the vehicle. The condition has occurred multiple times over several months and has resulted in repeated dealership visits. Repairs have included replacement an HVAC controller, but the failures have continued. The vehicle has been inspected multiple times by an authorized dealer, and the manufacturer has been notified through an open support case. As of the most recent repair visit, no confirmed root cause or permanent repair had been identified, and the dealership was still working with engineering support to diagnose the issue. Prior to and during these failures, numerous warning lamps and service messages appeared, including warnings related to power steering, traction control, transmission, four-wheel drive, trailer brake system, steering column lock, and tire monitoring systems. In some incidents, the vehicle entered reduced-performance mode. These warning messages first appeared in November 2025 and have continued intermittently despite multiple repair attempts. The recurring and unresolved loss of power steering assist while driving creates an ongoing risk of crash or injury.

Filed Jun 30, 2026 · Electrical, Engine · DE

My 2024 GMC Sierra Denali Ultimate 1500 experienced a catastrophic powertrain failure that created a serious safety hazard. On XXX, while driving at highway speeds, the truck unexpectedly shifted into neutral, causing an immediate loss of propulsion. During this event, the electrical system was also affected. The battery power dropped, power steering assistance was lost, and due to the electronic push-button start system, the vehicle could not be restarted while in this condition. This placed me and surrounding motorists at significant risk of a crash. I initially brought the vehicle to Point GMC, where I was advised no issue was found. After the problem continued, I returned on XXX and a dealership technician rode with me. During the test drive on [XXX], the truck again shifted into neutral, confirming the defect. The vehicle was then towed to the dealership, where diagnostics revealed DTC P0016. I was informed the engine had seized and required a complete engine replacement. The engine was replaced by an authorized GMC dealership in New Jersey. After only about 2,000 miles, the check engine light returned and the vehicle began experiencing additional electrical issues. This is a Denali Ultimate, the highest trim level, with advanced electronic systems, making these recurring failures especially concerning. To date, the vehicle has been inspected by three authorized GMC dealerships, and I have opened multiple cases with GMC Corporate. Despite repeated repair attempts, the manufacturer has not provided a permanent resolution. I continue to experience recurring engine and electrical issues and no longer have confidence in the safety or reliability of this vehicle. Given the repeated failures, loss of propulsion, loss of steering assistance, inability to restart the vehicle, and lack of resolution after multiple dealership visits and an engine replacement, I believe this matter warrants investigation by the federal safety agency. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 28, 2026 · Electrical, Engine · MD

My truck has completely shut down/ loss power on several occasions. Happened when I was l slowing down or completely stopped. Everything goes dark. Had to wait several minutes before truck would start.

Filed May 20, 2026 · Electrical, Transmission · NH

Check engine light illuminated with service transmission. The next day transmission started slipping and finally would not engage in reverse. Dealership Has it now and after diagnosis they advised that they had replaced the electronic control module to which, on the test drive, the gauge cluster blacked out and they got more codes. The cpdes that the vehical threw were the transmission valve body needed to be replaced.The truck has 24k miles on it.

Filed Apr 18, 2026 · Driver assistance, Electrical · FL

My GMC sierra with 40000 miles The check engine light turn on and was steady on when driving on the highway I loose a power on the vehicle for a few seconds and almost a semi truck behind me hit me because I don’t have any power on the vehicle, I stop on a safe place and try to start the vehicle again immediately call dealer for appointment an start drive to home. The lady on General Motors say I can drive safe with my vehicle but I don’t feel safe because nothing on the onstar computer works the emergency button and GPS it’s not working at all.

Filed Mar 11, 2026 · Electrical · AR

The gauge cluster quit working, I have no way of knowing my speed or how much fuel is in the vehicle. Feel like this is a safety issue with not being able to see the speedometer.